[1]张亚辉,刘勇,韩乃杰,等.旋喷桩加固黄土区重载铁路隧道基底效果分析[J].高速铁路技术,2024,15(06):104-110.[doi:10.12098/j.issn.1674-8247.2024.06.017]
　ZHANG Yahui LIU Yong HAN Naijie XU Qiang.Analysis of the Effect of Jet Grouting Pile Reinforcement on the Tunnel Foundation of Heavy-haul Railways in Loess Areas[J].HIGH SPEED RAILWAY TECHNOLOGY,2024,15(06):104-110.[doi:10.12098/j.issn.1674-8247.2024.06.017]
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旋喷桩加固黄土区重载铁路隧道基底效果分析()
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《高速铁路技术》[ISSN:1674-8247/CN:51-1730/U]

卷:
15卷
期数:
2024年06期
页码:
104-110
栏目:
勘察设计
出版日期:
2024-12-15

文章信息/Info

Title:
Analysis of the Effect of Jet Grouting Pile Reinforcement on the Tunnel Foundation of Heavy-haul Railways in Loess Areas
文章编号:
1674-8247(2024)06-0104-07
作者:
张亚辉1; 2; 刘勇2; 4; 韩乃杰3; 徐强2
(1.河北城乡建设学校, 石家庄 050031; 2.石家庄铁道大学道路与铁道工程安全保障教育部重点实验室, 石家庄 050043; 3.河北交通投资集团有限公司, 石家庄 050000; 4.中铁二院工程集团有限责任公司, 成都 610031)
Author(s):
ZHANG Yahui1; 2 LIU Yong2; 4 HAN Naijie3 XU Qiang2
(1.Hebei Urban and Rural Construction School, Shijiazhuang 050031, China; 2.MOE Key Laboratory of Roads and Railway Engineering Safety Control, Shijiazhuang Tiedao University, Shijiazhuang 050043,China; 3.Hebei Transportation Investment Group Co.,Ltd., Sh
关键词:
重载铁路;  隧道;  黄土;  加固;  动力响应
Keywords:
heavy-haul railway;  tunnel;  loess;  reinforcement;  dynamic response
分类号:
U45
DOI:
10.12098/j.issn.1674-8247.2024.06.017
文献标志码:
A
摘要:
黄土地区土体因其湿陷性较大,导致基底稳定性较差,道床、基底等均可能在列车的动力振动作用下发生基底下沉、开裂、翻浆冒泥等病害,这在一定程度上遏制了重载铁路的发展,影响了列车的运行安全。依托山西中南部铁路通道石楼隧道,建立三维有限元模型,针对旋喷桩加固效果进行计算分析,首先针对在隧道施工期间旋喷桩的加固效果进行计算,结果表明:在无旋喷桩加固时,仰拱部分最大隆起量为16.3 cm,采用旋喷桩加固后,最大隆起量降低为5.66 cm,且仰拱各测点的变形量的变化幅度减小,说明旋喷桩不仅起到了减小围岩变形的作用,同时也提高了围岩稳定性。其次对运营期间旋喷桩对于改善仰拱动力响应效果方面进行了计算分析,结果表明:当采用旋喷桩时,仰拱中心位置最大位移振幅由2.51 cm降低至 0.69 cm,降幅达72.5%; 加速度响应方面,仰拱中心位置的加速度峰值最大,其值为3.29 m/s-2,较无加固时的5.11 m/s-2降低了近36%。
Abstract:
The soil in loess areas exhibits significant collapsibility, leading to poor foundation stability. Components such as the track bed and foundation may experience settlement, cracking, mud pumping, and other defects under the dynamic vibration of trains. These issues have hindered the development of heavy-haul railways to a certain extent and compromised train operation safety. Based on the Shilou Tunnel of the Central and Southern Shanxi Railway Corridor, a three-dimensional finite element model was established to analyze the reinforcement effectiveness of jet grouting piles. Initially, the reinforcement effect of jet grouting piles during tunnel construction was calculated. The results indicated that without jet grouting pile reinforcement, the maximum uplift of the inverted arch was 16.3 cm, which was reduced to 5.66 cm after reinforcement. Additionally, the variation amplitude of deformation at various measurement points on the inverted arch decreased, suggesting that jet grouting piles not only reduced surrounding rock deformation but also improved its stability. Furthermore, this paper conducted computational analysis on the effectiveness of jet grouting piles in improving the dynamic response of the inverted arch during operational periods. The results showed that when jet grouting piles were used, the maximum displacement amplitude at the center of the inverted arch decreased from 2.51 cm to 0.69 cm, representing a 72.5% reduction. In terms of acceleration response, the peak acceleration at the center of the inverted arch was the highest, with a value of 3.29 m/s-2, which was nearly 36% lower than the 5.11 m/s-2 observed without reinforcement.

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备注/Memo

备注/Memo:
收稿日期:2024-01-30
作者简介:张亚辉(1989-),男,副教授。
基金项目:河北省自然科学基金资助项目(E2020210068); 中铁二院工程集团有限责任公司院控项目(KYY2018071(18-20)); 河北省大学生创新项目(S202010107080)
更新日期/Last Update: 2024-12-15